This work demonstrates a novel 2.45-GHz bi-directional circuit that can operate as both a wireless power transmitter and energy harvester. The circuit is based on a class-F oscillator/rectifier and is energy-autonomous since it does not need an external bias supply for either power transmission or power reception. Bi-directionality is exploited in two steps: the system first operates in rectifying mode with harvested DC voltages for biasing the oscillator; followed by the transmitting mode where the harvested DC power is used to start up oscillations. Conversion efficiencies for both configurations are higher than 50% for output/input RF power in the 10dBm range. This component can be exploited as a “power relay node” for distributed battery-less energy autonomous microsystems.
Energy-autonomous Bi-directional Wireless Power Transmission (WPT) and energy harvesting circuit / del Prete, Massimo; Costanzo, Alessandra; Georgiadis, Apostolos; Collado, Ana; Masotti, Diego; Popovic, Zoya. - ELETTRONICO. - (2015), pp. 7166982.1-7166982.4. (Intervento presentato al convegno 2015 IEEE MTT-S International Microwave Symposium (IMS) tenutosi a Phoenix (AZ) nel 17-22 May 2015) [10.1109/MWSYM.2015.7166982].
Energy-autonomous Bi-directional Wireless Power Transmission (WPT) and energy harvesting circuit
DEL PRETE, MASSIMO;COSTANZO, ALESSANDRA;MASOTTI, DIEGO;
2015
Abstract
This work demonstrates a novel 2.45-GHz bi-directional circuit that can operate as both a wireless power transmitter and energy harvester. The circuit is based on a class-F oscillator/rectifier and is energy-autonomous since it does not need an external bias supply for either power transmission or power reception. Bi-directionality is exploited in two steps: the system first operates in rectifying mode with harvested DC voltages for biasing the oscillator; followed by the transmitting mode where the harvested DC power is used to start up oscillations. Conversion efficiencies for both configurations are higher than 50% for output/input RF power in the 10dBm range. This component can be exploited as a “power relay node” for distributed battery-less energy autonomous microsystems.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
